Whether you are running dual batteries to power your overland accessories or using it as a back up to your main battery, you're going to want to keep that battery safe at all costs. Our 4Runner Secondary Battery Box is made from strong, rust-free stainless steel, and offers protection on all sides of your Group 34 or 35 battery. TIG-welded for a precise, snug fit, you can be sure your battery will be virtually unmovable. Integrated into this design are mounting points for the ARB Differential Axle Breather Kit, Blue Sea System or Red Arc automatic charging relay, and includes zip tie slots for clean and secure mounting of your battery cables.